James w



(No Model.)

J. W. MALOY.

STONE CUTTER HEAD,

' Patented Jan. 19, 1886.v

InUEzitur";

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10 heads used for cutting stone; and it consists xzo vation of my improved cutter-head. Fig. 2is

JAMES W. MALOY, OF SOMERVILLE,

TO THE AMERICAN MARBLE OUTT ASSIGNOR, BY MESNE ASSIGNMENTS, ING COMPANY, or BOSTON, MASS.

STONE-CUTTER HEAD.

ESPEGIPICATION forming part of Letters Patent No. 334,595, dated January 19, 1886.

Application filed December 15, 1884. Renewed N To all whom it may concern:

Be it known that I, JAMES W. llIALOY, a citizen of the United States, and a resident of Somerville, in the county of Middlesex and 5 State. of Massachusetts, have invented certain new and useful Improvements in Stone-Cutter Heads, of which thefollowing isa specification.

My invention relates'to that class of cutterof a hub provided with lateral studs or bearings, and with disk-cutters revolving on said bearings, all constructed and arranged,as,full y set forth hereinafter, so as to cut the stone 1 5 without chipping the edges, secure increased durability of the cutters, thoroughly lubricate the same, and generally improve the operation of the device.

In the drawings, Figure l is a sectional elean inverted plan View. Fig. 3 is a diagram illustrating the course of the cutting-edges. Figs. 4 and 5 are detached views illustrating the channel-bearing surfaces. Figs. 6 and 7 illustratemodifications. Fig.8 illustrates the operation of a cutter of ordinary construction. A represents thehub of acutter-head,which is threaded or otherwise adapted for attachment to the driving-spindle of the machine, and which is provided with an angular projection, at, having three or more faces, from each of which extends at right angles a Stud, 0, supporting the revolving circular cutters B, each of which consists of one. or more fiat beveled-edged disks, 1) b b, clamped or otherwise secured together so as to be readily detachable, and so as to permit each cutter to be built up of a series of disks of a Y desired thickness or varying thicknesses, a rfdbfisueh 0 number as to form a cutter of the required dimensions.

In the drawings, the projection a is shown as having four equal Sides, and it will be seen that the studs 0 are set nearest the forward 5 edge of each side, instead of being upon a radial line, so as to leave a clearance between the rear edge of each cutter and the edge of the material cut by'the forward edge of the said cutter. When the projection has three uvember 27, 1885. Serial No. 184,127. (No model.)

likewise arranged out of center to secure the requisite clearance, as illustrated in Fig. 6.

Each stud c is arranged at right angles to the axis of the hub, so that the cutters will stand at right angles to the face of the stone. This insures a direct downward cut and prevents the chipping of the stone at the edges of the opening, which results when the cutters are set fiaringly outward, in the usual manner, as illustrated in Fig. 8. This result may be secured by arranging .the cutters either vertically, as described, or converging toward the lower edges, as illustrated in Fig. 7, the stone in either case chipping ahead of the cutters or toward the center, instead of radially out- Ward.

In order to cut or score the stone upon circular lines in close proximity without of ne cessity using" thin cutting-disks b or fine or closely-arranged cutting-edges, I set each cutter so that the cutting-edgex of each disk will travel in a path nearer to or farther from the center than the edges of the following disks, so that while the said edges in each cutter are sufficiently far apart to permit heavy and durable disks to be used, the scores a Z) c d, made by the following edges of the various cutters, will be close together, as shown in the diagram, Fig. 3, thereby greatly facilitating the cutting, reducing the liability to chip, and avoiding the rapid wear which results when the cutting-edges upon each cutter are in close proximity.

Each cutter may turn directly upon the stud c. I prefer, however, to mount the several disks composing each cutter upon asleeve, D, provided with a shoulder, y, and with a threaded end receiving a nut, E, by which the ks are clamped firmly in place upon the slee which rotates upon the stud.

In th1s-class of machines lthe access of fine marble-tins I o the bearingslof the cutters results in the rapd, wear of th said bearings and in the drumming r f the il used for lubricating thesame. lopr nt this,Iinclosethe end of the sleeve D in atubu ar guard, Lwhich extends from the face of the projections a to the adjacent side of the cutter, forming an oil- 50 or any other number of sides, the studs are chamber,w, surrounding the end of thesleeve, in which the lubricant may be put when the cutter is mounted upon its stud, and where it is contined,so as to flow readily to the bearingsurfaces without permitting the access of dust.

To facilitate the passage of the lubricant to the stud, I form one or more notches, t, in the end of the sleeve D, and to secure a better lubrication than would result from the hearing of the sleeve against the side of the projection a, I mount a disk, J, upon the stud and secure a second disk, K, across the guard-tube I, extending between the end of the sleeve D and the disk J, and I form recesses s in the lace of the disk J, so that the sleeve has a bearing against the face ot'the disk K,and the latter has a bearing against the face of the disk J, anti these parts are all inclosed by the guard-tube Lwithin which the lubricating material is confined in contact with all the faces. The sleeve D is held in position upon the stud c by a nut. N, screwing upon the threaded end of the stud and bearing upon an intervening washer.

1 do not here claim a head carrying railroad studs and disks converging toward their lower edges, as this is claimed in my application filed December 15, 1884, No. 150,416.

\Vithout limiting myself to the precise arrangement of parts shown, I claim- 1. The combination, in a stone-cutter head, of a hub carrying a series of studs projected at right angles to the axis of the hub and cutter-disks mounted upon said studs, parallel to the axis of the hub, substantially as set forth.

2. The combination, in a cutter-head, of a hub provided with laterally-projecting studs carrying dislccutters at their outer endseach of said studs being arranged with the axis of the disk forward of the axis of the hub, substantially as set forth.

3. The combination, in a cutter-head, of a hub and studs extending laterally from the axis thereof and carrying circular cutters arranged at dili'erent distances from the axis of the hub and at the outer ends of the studs,so that the cutting-edges of each cutter will travel upon circular paths parallel to but differing from those of all the other cutters, substantially as set forth. 7

4. The combination of the cutter-head having an angular extension, 0, a stud projecting laterally from each side face of said extension, a sleeve revolving upon said stud and carrying the cutter,and guard [.inclosing thespace between the cutter and the face of the hub and forming a chamber to receive the lubricating material, substantially specified.

5. The combination of the cutter-head, the hub, stud projecting laterally from the hub, cutters mounted on the stud, a sleeve also mounted upon the stud and provided with grooves i, and inclosing-guaid I,substantially as set forth.

6. The combiuation,with the cutter-head,of the hub, a stud projecting laterally from the hub,asleeve mounted on the studand cutters carried on the stud,chaunel disk J,embracing the stud, tubular guard I, and intervening disk, K, substantially as set forth.

In testimony whereofI have signed my name to this specification in thepresence of two subscribing witnesses.

JAMES WV. MALOY.

\Vitnesses:

GEORGE R. EAGER, CHAS. M. TILLINGHAST.

d It is hereby certified that Letters Patent No. 334,595, granted January 19, 1886, upon the application of James Maloy, of Boston, Massachusetts, for an improvement in Stone-Gutter Heads, was erroneously issued to The American Marble Cutting Company? that said Letters Patent should have been issued to The American Mwrble Cutting Oompetrv/y ofdvlm'ne, its principal place of business being in Boston, Massachusetts that this correction has been made in the records of the case in the Patent Office, and that the said Letters Patent should be read to conform thereto. -Signed, countersigned, and sealed this 3d day of August, A. D. 1886.

[SEAL-1 H. L. MULDROW,

Acting Secretary of the Interior.

Oountersigned:

B. B. VANCE,

Acting Commissioner of Patents. 

